For its price, it is an excellent product. It has been working flawlessly for a year now. It connects to the alarm and operates automatically. The installation is, of course, a bit troublesome, especially if you're doing it for the first time without experience. It requires drilling holes in the doors internally to secure the mechanisms. You need to find the right position for it to open and close easily without any difficulty. It requires some work, but the result is good and worth it

Perfect, I just didn't know it also has an alarm!! The only thing missing is the siren to complete it.
Beautiful, easy to use and install

The brain is W*H*D= 6.5*4.5*2.3 not waterproof.
The activator is W*H*D= 14*6.5*2.9 waterproof.
The brain is not waterproof, if you place it on the door, avoid window inspection openings.
A good spot is on the horizontal top side.
It has an output connection for remote control or button or keyless entry control or alarm.
Cable length is satisfactory for a 4-door through-floor diagonal installation.
The activator is ideal if it is parallel to the metal rod of the lock.
The closer the activator is to the lock, the less force is needed.
The blades and brackets bend into the desired shape. The blades are not galvanized.

Honest for the money it costs, I have had it for 4 months in a car and it has not presented any problems, it works perfectly!
I recommend it!